Enable Futures for Sub Account

POST /sapi/v1/broker/subAccount/futures

Parameters:

Name	Type	Mandatory	Description
subAccountId	STRING	YES
futures	ENUM	YES	only `true` for now
recvWindow	LONG	NO
timestamp	LONG	YES

Response:

{
	"subaccountId": "1",
	"enableFutures": true,
	"updateTime": 1570801523523
}

Enable Futures for Sub Account​